Chap. X.] 



THE LUNG, 



181 



put forward by M. Gosselin. This surgeon believes 

 that at the time of the injury the lungs are suddenly 

 filled and distended with air by a full inspiration, and 

 that the air, prevented from escaping by occlusion of the 



Pig. 16. Diagram to show the relations of the Heart to the Surface. 



(After Eiidinger.) 

 i, Left innominate vein; 6, right innominate vein; c, superior vena cava; d, 



right auricle ; e. inferior vena cava; /, aorta ; g, pulmonary artery ; 7, right 



ventricle ; i, left ventricle ; j, left auricle. 



larynx, thus becomes pent up in the pulmonary tissue, 

 and the lung not being able to recede from the superin- 

 cumbent pressure, its structure necessarily gives way. 

 Owing to the fineness of its capillaries, and to the 

 fact that all venous blood returned to the heart must 

 pass through the lungs before it can reach other parts 

 of the body, it follows that pysemic and other secondary 



